The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 2021
Filed:
Feb. 28, 2017
Autocloning Technology, Ltd., Sendai, JP;
Photonic Lattice, Inc., Sendai, JP;
Sophia School Corporation, Tokyo, JP;
Keio University, Tokyo, JP;
Shojiro Kawakami, Sendai, JP;
Takayuki Kawashima, Sendai, JP;
Takafumi Chiba, Sendai, JP;
Toshikazu Ijiro, Sendai, JP;
Hiroyuki Tsuda, Yokohama, JP;
Hiroshi Takahashi, Tokyo, JP;
Photonic Lattice, Inc., Miyagi, JP;
Sophia School Corporation, Tokyo, JP;
Keio University, Tokyo, JP;
Abstract
To provide a volume-type optical element in which a self-cloning photonic crystal is used. An optical element is provided with half-wave plates of photonic crystals formed on the xy plane and laminated in the z-axis direction in a three-dimensional space x, y, z. The groove direction of the photonic crystals is a curved line, and the angle in relation to the y-axis direction changes continuously in the range of 0°-180°. Light entering the optical element in the axial direction is emitted from the optical element upon being divided and converted into clockwise circularly polarized light in the direction facing the x-axis by a given angle from the z-axis and anticlockwise circularly polarized light in the direction facing the −x-axis by a given angle from the z-axis. Laminating or placing a quarter-wave plate comprising a photonic crystal on one or both surfaces makes it possible to divide light entering from the z-axis direction of the optical element into two orthogonal linearly polarized lights.